Stuffing-box.



110.851.147. PATBNTED APR. 23, 190m LB. WILLINGS.

STUFFING BOX.

APPLIOATION FILED AUG. z, 1906.

. 2 SHEETS-SHBBT 2.

JOSEPH B. WILLINGS, VANBUREN, INDIANA.

STUFFING-BOX.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed August 2,1906. Serial No. 328,909.

To all whom, t 11i/any concern.-

Be it known that I, JOSEPH B. WILLINes, a citizen of the United States,residing at Vanburen, in the county of Grant and State of Indiana, haveinvented certain new and use- -ful Improvements in Stufling-Boxes; and Ido declare the followineF and exact description of the invention, suchas will enable others skilled in the art to which it appertains to makeand use the same.

This invention is an improved stuffing box, which is particularlyadapted for use on the reciprocating rods of the pumps of oil and waterwells, but which may be used for other purposes.

One obj ect of the invention is to provide a stufling box in which thespring or springs which press its packing against the reciprocating rodwill be well protected by a shield so that it cannot rust orcrystallize.

Another object of the invention is to improve and simplify theconstruction of stuifing boxes of this character and thereby render thesame more durable and effective, and

less expensive. i

Vith the above and other objects in view, the invention consists ofcertain novel features of construction, combination and arrangement ofparts hereinafter described and claimed.

In the accompanying drawings ,MFigure 1 is aside elevation of myimproved stuiiing box; Fig. 2 is a longitudinal sectional view throughthe same; Figs. 3 and 4 are transverse sectional views, takenrespectively on the planes indicated by the lines 3-3 and 4-4 in Fig. 1Fig. 5 is aview similar to Fig. 2, showing a slightly modified form ofthe stufling box; Fig. 6 is a detail sectional view through another formof stuffing box, showing the manner in which its springs may beprotected; and Fig. 7 is a detail sectional viewof still another form ofstuffing box embodying the invention.

.Referring to the drawings by numeral, 1 denotes the improved stuflingbox, through which the rod 2 reciprocates. The stufling box comprises atubular body 3 having the rod 2 extending through and sliding in itsbore and having external screw threads 4 at one of its ends to permit itto be attached to the pump or other apparatus on which it is used. Tofacilitate its attachment and removal, the body 3 is formed adjacent tothe to be a full, clear,

threads 4, with flattened portions 5 adapted to be engaged by a wrench.At the opposite 4end of the body 3 is formed a cylindrical enlargement6, which latter has at its outer end a circular recess or cavity 7 whichis concentric with the bore of the body` 3, and at its inner end anannular groove or recess 8 is also concentrically arranged. The grooveor recess 8 is adapted to receive a coil spring 9, which surrounds thetubular body 3 and is confined between the inner end 10 of the groove 8and an annular flange 9L formed upon an externally screw-threaded collaror sleeve 10. The latter serves as a follower for the springQ and isadapted to slide longitudinally upon the body 3, it being prevented fromrotating thereon by a key 11 carried by the body 3 and projecting into agroove in said collar or sleeve, Its external screwthreads 12 areengaged by similar internal screw-threads formed in the open end of apressure cap or casing 13 which telescopes the enlargement 6 and has therod 2 projecting through an aperture 14 in its closed end 15. A packing16 of any suitable form is arranged in the casing or cap 13 between itsend 15 and that end of the enlargement 6 in which the recess 7 isprovided, said packing being shaped to enter said recess, as shown. Uponthe outer face of the end 15 of the cap or casing 13 is formed apolygonal shaped portion 17 adapted tov be engaged by a wrench when itis desired to rotate the cap 13 and adjust it upon the follower nut orsleeve 10, and thereby vary the tension of the spring 9 upon the packing16. The cap or sleeve 13 is formed adjacent to its closed end 15 withlongitudinally extending, oppositely disposed slots 1S which permit thepacking 16 to be seen and which permit any water within the cap orcasing to escape therefrom. Similar slots 19 are provided adjacent tothe opposite end of the cap or casing, so that the adjustment of theparts within the same may be seen.

The form of the invention shown in Fig. 5 of the drawings is verysimilar to that shown in Fig. 2. grooved inner end of the enlargement 6forms a shield for the spring 9, and that this shield in Fig. 5 of thedrawings is made separate` from the enlargement 6 or the tubular body 3and is slidably mounted upon the latter, as shown. This shield 18at hasits closed end IOC It will be noted that in Fig. V2, the

dercut inner end 20 of the enlargement 6.

In all other respects, the construction and operation of this form ofthe invention is the same as that of the one shown in Fig. 2.

In Fig. 6 of the drawings, I have shown a Well known form of stuflingboX consisting of a body portion 21 containing the packing 22, which isheld in position by a clamping member 23. The latter is clamped upon thebody 21, by means of bolts 24 between the nuts 25, upon which and saidbars 23 are arranged coil springs 26. inclosed in a casing consisting oftwo telescoping sections 27,128 which are interposed between the nuts 25.and the member' 23, as shown.

The form of the invention shown in Fig. 7 is somewhat similar to thatshown in Fig. 2 of the drawings, the chief difference being in the useof rods or bolts 30 for adjusting the tension of the spring, instead ofthe screwthread connection 12 between the cylinder 13 and the collar orsleevelO. It Will be seen that in this form of the invention, the springis well protected from moisture.

From the foregoing description, taken in connection with theaccompanying drawings, the construction, operation and advantages of theinvention will be readily understood without requiring a more extendedexplanation.

While I have shown and described vonly afew of the many forms of myimproved spring shield or protector, it will be under-` These springsare stood that I do not wish to be limited to the i precise showingherein set forth, since varlous changes 1n the form, proportion, and

the minor details of construction may be resorted to without departingfrom the principle or sacrificing any of the advantages of theinvention; as defined by the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters-'Patent is l. A stuiiing boX comprising a tubularbody, a spring shield or protector thereon, a spring arranged in saidshield or protector, a follower for said spring slidably mounted uponsaid body, a pressure cap or casing adjustablyconnected to saidfollower, and a packing interposed between said cap or casing and saidspring shield.

2. A stuing boX comprising a tubular body, a spring shield at one endthereof, a coil spring within said shield, a follower nut or sleeve forsaid spring slidably but nonrotatably mounted upon said body, a pressurecap or casing surrounding said spring shield and screwed upon saidfollower nut or Y sleeve, and a packing interposed between said cap orcasing and said spring shield.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOSEPH B. WILLIN GS. Witnesses:

A. L. WooDARD, OTTO BUTLER.

